package com.neu.questionnaireplus.utils.page;


import com.neu.questionnaireplus.utils.ServletUtils;

public class TableSupport {

  /**
   * 当前记录起始索引
   */
  public static final String PAGE_NUM = "pageNum";

  /**
   * 每页显示记录数
   */
  public static final String PAGE_SIZE = "pageSize";

  /**
   * 排序列
   */
  public static final String ORDER_BY_COLUMN = "orderByColumn";

  /**
   * 排序的方向 "desc" 或者 "asc".
   */
  public static final String IS_ASC = "isAsc";

  /**
   * 分页参数合理化
   */
  public static final String REASONABLE = "reasonable";

  /**
   * 封装分页对象
   */
  public static PageDomain getPageDomain() {
    PageDomain pageDomain = new PageDomain();
    pageDomain.setPageNum(ServletUtils.getParameterToInt(PAGE_NUM));
    pageDomain.setPageSize(ServletUtils.getParameterToInt(PAGE_SIZE));
    pageDomain.setOrderByColumn(ServletUtils.getParameter(ORDER_BY_COLUMN));
    pageDomain.setIsAsc(ServletUtils.getParameter(IS_ASC));
    pageDomain.setReasonable(ServletUtils.getParameterToBool(REASONABLE));
    return pageDomain;
  }

  public static PageDomain buildPageRequest() {
    return getPageDomain();
  }
}
